Comparing susceptibility of Tetranychus urticae and Tetranychus cinnabarinus to common miticides

Toxicity of pyridaben and five other miticides to Tetranychus urticae and T. cinnabarinus was determined using both slide-dip and leaf residue methods. LC50s of the six miticides for eggs and female adults of T. urticae were significantly higher than for T. cinnabarinus, indicating that T. urticae miticide tolerance is higher than that of T. cinnabarinus. The difference between the two spider mites in hexythiazox susceptibility was relatively small, while differences in fenazaquin, pyridaben, and abamectin susceptibility were large.